D1.2.7—Complementary base pairing Topic Practice
D1.2.7—Complementary base pairing Topic Practice

IB Biology syllabusBiology SL/HLFirst assessment 2025
Practise using base pairing to connect DNA, mRNA and tRNA anticodons, and explain how correct tRNA charging supports translation.
How this is tested
- match DNA triplets, mRNA codons and tRNA anticodons in sequence questions
- explain how tRNA shape and activating enzymes link the correct amino acid
- outline how codon-anticodon pairing builds a polypeptide during translation
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